Testing Lorentz invariance of dark matter with satellite galaxies

Journal Article · Mon May 01 00:00:00 EDT 2017 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2017/05/024· OSTI ID:22676216

Bettoni, Dario ^[1]; Nusser, Adi ^[2]; Blas, Diego; Sibiryakov, Sergey ^[3]

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1. Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg (Germany)
2. Physics Department and the Asher Space Science Institute—Technion, Haifa 32000 (Israel)
3. Theoretical Physics Department, CERN, CH-1211 Geneva 23 (Switzerland)

We develop the framework for testing Lorentz invariance in the dark matter sector using galactic dynamics. We consider a Lorentz violating (LV) vector field acting on the dark matter component of a satellite galaxy orbiting in a host halo. We introduce a numerical model for the dynamics of satellites in a galactic halo and for a galaxy in a rich cluster to explore observational consequences of such an LV field. The orbital motion of a satellite excites a time dependent LV force which greatly affects its internal dynamics. Our analysis points out key observational signatures which serve as probes of LV forces. These include modifications to the line of sight velocity dispersion, mass profiles and shapes of satellites. With future data and a more detailed modeling these signatures can be exploited to constrain a new region of the parameter space describing the LV in the dark matter sector.

• OSTI ID: 22676216
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 05; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
DISPERSIONS
GALAXIES
LORENTZ INVARIANCE
MASS
MODIFICATIONS
NONLUMINOUS MATTER
SATELLITES
SIMULATION
SPACE
TIME DEPENDENCE
VECTOR FIELDS
VELOCITY